Pin box and set pin assembly



N n mimi EM" E. J. DOMBROWSKE PIN4 BOX AND SET PIN ASSEMBLY Filed Deo.2l, 1961 Dec. l5, 1964- most row of apertures is engaged to cause suchpin to move downwardly in aperture ld. When the depression force isremoved from key stem 23 the latter is `returned to its original upwardposition by spring 24. However, the force exerted on the settable stoppin l by key stem 23 causes shoulders Ztl to press against encirclingbulge i7. Bulge 17 is compressed or squeezed by shoulders 2t) and thusthe shoulders traverse the bulge to allow the stop pin to move in adirection parallel to the pins aids. As shoulders 2t) traverseencircling bulge i7 the latter expands and assumes its original shape.ln the course or expansion, bulge 17 imparts impetus or a snap action tothe stop pin as the latter moves past the intermediate positionillustrated on the extreme right in FIG 3 to thereby assure completionof the intended vertical movement of the pin to the lower set positionin pad ll. When the pin assumes the lower set position in the lowerextreme portion of aperture lli as illustrated by the center pin in FIG.3 it is detented against bottom plate 13 by the restraining force of thebottom portion of resilient bulge 17 abutting against the upper portionsof shoulders 2li.

After a stop pin l5 has been set in the above-described manner, the pinbox will escape to the next highest order, in a manner well known in theart, tto position this next highest order under key stems Z3 for settinga stop pin in that order. When the selected number of pins have been setby the operator of the calculator, a motor bar key, not shown, isoperated to cycle the machine. ln operation of a calculator the settingof the stop pins and their function is well known in that the stop pinsregulate the movement of add racks 25 which move to envage the set stoppins during the cycling of the machine and enter the selected amountsinto accumulatore, not shown.

After a cycling of the calculator, stop pins l5 are re* stored to theupper inoperative extreme positions in the detent pad 11 by a cammingaction not shown, but well known in the art. The pin box then :travelslaterally in a reverse direction to regain the start positionpreparatory to another cycling of the machine. In the course of returnmovement to the upper position in aperture i4, pin 15 moves verticallyunder the force applied to the bottorn 26 of the pin by the cammingmechanism and shoulders 2t) again engage and move past bulge t7 whichwill distort under the pressure applied to it by shoulders 2Q. Thecontraction and ensuing expansion of the bulge 17 in the course of thepins return movement snaps the pin into its upper extreme position inthe pad l1.

It is apparent from the foregoing that the novel pin box `10 describedhas many advantages in operation. The resilient pad Il provides a novelstructure detenting the stop pins in either their set or in theirinoperative positionswith the inherent qualities of the pad impartingimpetus or a snap action to a pin to assure that the pin completes anintended movement to either oi the two extreme positions in the detentpad. This construction is advantageous in that no springs are used toposition the pins in the pin box to detent the stop pins. ln addition,the cost of manufacture is reduced, and repair and maintenance of thepin box are kept to a minimum.

lt will be understood by those skilled in the art that the aperture 14need not be circular but may be of rectangular configuration with bulgeportions at those Wall portions of the aperture which are to be engagedby shoulders 20 of pin 15.

Although one embodiment of the present invention has been illustratedand described in detail, it is to be expressly understood that theinvention is not limited thereto. Various changes can be made in thedesign and arrangement of parts without departing from the spirit andscope of the invention as the same will now be understoodby thoseskilled in the art.

What is claimed is:

l. A pin box, comprising (a) a pad member having a plurality ofapertures,

(b) a settable pin slidably arranged in each aperture with each pinbeing movable between a pair of spaced positions within a said aperture,

(c) means on said pins limiting movement thereof within said apertures,

(d) and detent means including means on the wall of each aperturecooperating with said pin limiting means to detent a pin at the limitsof movement in a said aperture,

(e) said wall means of said detent means being yieldable upon movementof a pin from either of said pair of spaced positions past anintermediate position to supply impetus to a said pin in the directionof movement thereof.

2. A pin box, comprising e (a) a pair of spaced parallel plates,

(b) slots formed in each plate with each slot in one plate having acorresponding slot in the other plate in alignment therewith,

(c) a resilient pad member disposed between said plates having aplurality of apertures,

(d) a settable pin arranged in each aperture and slidably disposedwithin each pair of alignedI slots,

(e) means on said pins for limiting the movement thereof between thespaced plates, and

(f) means on the wall of each aperture intermediate said spaced parallelplates engaging said limiting means on each pin to detent the pin attheir limits of movement,

(g) said detent means on the wall of each aperture being yieldable underpressure applied to said pins to allow said pins to move past saiddetent means.

3. The pin box of claim 2 wherein saidI detent means is distortable bysaid pins and permits said pins to move in a direction parallel to theaxis of the pins past said detent means in either direction.

4. A pin box of the class described, comprising (a) a pair of spacedparallel plates,

(b) slots formed in each plate with each slot in one plate having acorresponding aligned slot in the other plate,

(c) a resilient pad member having a plurality of apertures and disposedbetween said plates,

(d) said apertures each having a wall portion of reduced diameter,

(e) a settable pin arranged in each aperture slidably disposed Withineach pair of aligned slots,

(f) each of said pins having a shoulder portion intermediate the endsthereof to limit the movement of said pin between the spaced plate-s,

(g) said reduced diameter wall portion of each of said f aperturesengaging said shoulders to detent the pin at its limits of movement, and

(h) said reduced diameter wall portions of each of said apertures ofsaid pad member being yieldable upon movement of the pin from eitherlimit position past an intermediate position to exert a force upon saidpin in the direction of movement thereof.

5.` The pin carriage of claim 4 wherein said resilient pad member isformed of molded rubber.

6. A pin box, comprising (a) a pair of spaced parallel plates,

(b) slots formed in each plate with each slot in one plate having acorresponding slot in the other plate in alignment therewith,

(c) resilient material disposed between said plates and provided with anaperture in alignment with one pair of said aligned slots,

(d) a settable pin slidably disposed within said one pair of alignedslots and extending through said aperture with said pin being movablebetween selected spaced positions,

` (e) first restraining means on said pin and second restraining meanson a wall of said aperture cooperating to restrain ready movement ofsaid pin between said selec-ted spaced positions,

(f) said second restraining means on the wall of said aperture furtherbeing distortable upon movement of said pin between said spacedpositions past an intermediate position in said aperture to exert aforce upon said pin in the direction of movement thereof.

7. A pin box, comprising (a) a pair of spaced parallel plates,

(b) slots formed in each plate with each slot in each plate having acorresponding slot in the otherplate in alignment therewith,

(c) a resilient pad member disposed between said plates and having aplurality of apertures therein,

(d) a settable pin arranged in each aperture with each pin slidablydisposed in a pair of said aligned slots in said plates and movablebetween selected positions defined by said plates,

(e) means on said pins to limit movement thereof between said selectedpositions, and

(f) wall portions of said apertures being spaced from `said limitingmeans on said pins to detent said pins at their limits of movementwithin said apertures,

(g) said wall portions being distortable upon movement of the pins fromeither limit position past an intermediate position to exert a forceupon said. pin in the direction of movement thereof.

8. The pin box of claim 7 wherein said wall portions of each aperturecomprise a wall portion thereof of reduced cross section.

9. A pin box, comprising (a) a pair of spaced parallel plates,

(b) slots formed in each plate with each slot in one plate having acorresponding slot in the other plate in alignment therewith,

(c) a resilient pad member disposed between said plates having aplurality of apertures,

(d) a settable pin arranged in each aperture with each pin slidablydisposed within a pair of said aligned slots,

(e) means on said pins for limiting the movement thereof between saidspaced plates, and

(f) said apertures each having a wall portion of reduced diameterintermediate said spaced parallel plates engaging said limiting means onsaid pins to detent said pins at their limits of movement,

(g) said reduced diameter portion of each aperture being yieldable underpressure applied to said pins to allow said pins to move in a directionparallel to the axis of said pins past said reduced diameter wallportions in either direction.

l0. A pin box, comprising (a) a pair of spaced parallel plates,

(b) slots formed in each plate with each slot in one plate having acorresponding slot in the other plate in alignment therewith,

(c) a resilient pad member disposed between said plates having aplurality of apertures,

(d) a settable pin arranged in each aperture with each pin slidablydisposed within a pair of said aligned slots,

(e) means on said pins for limiting the movement thereof between saidspaced plates, and

(j) said apertures each having a wail portion of reduced diameter toprovide an encircling bulge on the Wall of each aperture intermediatesaid spaced parallel plates,

(g) said encircling bulges engaging said limiting means on said pins todetent said pins at their limits of movement,

(h) said encircling bulges on the wall of each aperture being yieldableunder pressure applied to said pins to allow said pins to move in adirection parallel to the axis of said pins past said encircling bulgesin either direction.

11. A pin box, comprising (a) resilient material having an aperture, f

(b) a pin slidable in the aperture for movement between a pair of spacedpositions,

(c) iirst restraining means on said pin,

(d) second yieldable restraining means on the wall of said aperturecooperating with said iirst restraining means on said pin to restrainready movement of the pin between said pair of spaced positions,

(e) said second restraining means being yieldabl'e upon movement of saidpin to either of said pair of spaced positions to allow said firstrestraining means to move past said second restraining means, and

(f) means cooperating with said pin when the latter is in one of saidspaced positions for preventing movement of the pin in a direction awayfrom said other position.

References Cited in the file of this patent UNITED STATES PATENTS2,614,841 Joseph oet. 21, 1952 2,988,274 Carlsen et al. June 13, 19612,989,231 Mark June 20, 1961 FOREIGN PATENTS 199,518 Switzerland Nov.16, 1938 657,991 Germany Mar. 18, 1938

1. A PIN BOX, COMPRISING (A) A PAD MEMBER HAVING A PLURALITY OF APERTURES, (B) A SETTABLE PIN SLIDABLY ARRANGED IN EACH APERTURE WITH EACH PIN BEING MOVABLE BETWEEN A PAIR OF SPACED POSITIONS WITHIN A SAID APERTURE, (C) MEANS ON SAID PINS LIMITING MOVEMENT THEREOF WITHIN SAID APERTURES, (D) AND DETENT MEANS INCLUDING MEANS ON THE WALL OF EACH APERTURE COOPERATING WITH SAID PIN LIMITING MEANS TO DETENT A PIN AT THE LIMITS OF MOVEMENT IN A SAID APERTURE, (E) SAID WALL MEANS OF SAID DETENT MEANS BEING YIELDABLE UPON MOVEMENT OF A PIN FROM EITHER OF SAID PAIR OF SPACED POSITIONS PAST AN INTERMEDIATE POSITION TO SUPPLY IMPETUS TO A SAID PIN IN THE DIRECTION OF MOVEMENT THEREOF. 